2011 Fiscal Year Final Research Report
The evolution of Archean continental roots : An integrated study of crustal and mantle xenoliths and intracontinental high-pressure metamorphic belts of Tanzania
| Project/Area Number |
21340148
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Geology
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| Research Institution | Okayama University |
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Principal Investigator |
TSUJIMORI Tatsuki 岡山大学, 地球物質科学研究センター, 准教授 (00436833)
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| Co-Investigator(Kenkyū-buntansha) |
KOBAYASHI Katsura 岡山大学, 地球物質科学研究センター, 准教授 (20325129)
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| Project Period (FY) |
2009 – 2011
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| Keywords | タンザニア地塊 / 下部地殻 / リソスフェアマントル / ざくろ石かんらん岩 / グラニュライト / エクロジャイト |
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| Research Abstract |
The lower crustal and lithospheric mantle xenolith suites of the Archean Tanzanian craton show lithological variation from kyanite-bearing high-pressure granulite(rare eclogite) to garnet-bearing peridotites. An integrated study of garnet peridotite xenoliths indicates strongly depleted zone in the lithosphere root at depths of~ 130-145 km ; a few samples suggest an initial stabilization at depths of~ 160 km. Moreover, the study revealed that the cratonic root is pervaded by episodic metasomatic melts, which have interacted with lithospheric mantle beneath the Archean Tanzanian craton. This indicates a physicochemical stratification of the lithospheric mantle beneath the Tanzanian craton.
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Research Products
(23 results)
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[Journal Article] The Cretaceous Okhotsk. Chukotka Volcanic Belt(NE Russia): Geology, geochronology, magma output rates, and implications on the genesis of silicic LIPs2011
Author(s)
Tikhomirov, P. L., Kalinina, E. A., Moriguti, T., Makishima, A., Kobayashi, K., Cherepanova, I. Yu., Nakamura, E.
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Journal Title
Journal of Volcanology and Geothermal Research
Volume: v. 221-222
Pages: 14-32
Peer Reviewed
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[Journal Article] Provenance and reconnaissance study of detrital zircons of the Palaeozoic Cape Supergroup in South Africa : revealing the interaction of the Kalahari and Rio de la Plata cratons2011
Author(s)
Fourie, P. H., Zimmermann, U., Beukes, N. J., Naidoo, T., Kobayashi, K., Kosler, J., Nakamura, E., Tait, J., Theron, J. N.
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Journal Title
International Journal of Earth Sciences
Volume: v. 100
Pages: 527-541
Peer Reviewed
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[Journal Article] Transitional time of oceanic to continental subduction in the Dabie orogen : Constraints from U. Pb, Lu. Hf, Sm. Nd and Ar. Ar multichronometric dating2009
Author(s)
Cheng H., King R. L., Nakamura E., Vervoort J. D., Zheng Y.-F., Ota T., Wu Y.-B., Kobayashi K., Zhou Z.-Y.
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Journal Title
Lithos
Volume: v. 110
Pages: 327-342
Peer Reviewed
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